A US woman who shot and killed her husband and two adult children before taking her own life is thought to have committed the shocking crime as a result of being ostracised from the religion she was raised in.

Every time I tell a mate I’m doing a story on cryptocurrency, they invariably ask me the same two questions: should they invest their own hard-earned money, and which cryptocurrency will get them a Lamborghini/yacht/island quickest?

Coalition pledges regional plane access

A federal coalition government would not cut any regional airline's access to Sydney airport.

Opposition transport spokesman Warren Truss moved to reassure regional passengers flying to and from Sydney after recent reports Sydney Airport chairman Max Moore-Wilton suggested a way of expanding the airport's operations.

"Sydney Airport could operate a lot more efficiently if 40 per cent of our capacity by law, in peak hour, wasn't restricted to regional airlines including QantasLink," he told a lunch in Sydney last week, The Australian newspaper reported.

The airport boss was reportedly responding to a speech by Qantas chairman Leigh Clifford calling on the federal government to make a decision soon on a second airport for the city.

On Tuesday, Mr Truss said Mr Moore-Wilton's observation would be alarming to regional travellers.

"I can categorically rule out any watering down of the slots reserved for regional airlines through Sydney Airport," he said.

"It was the coalition in government that enshrined regional aircraft slots at Sydney Airport, and Transport Minister Anthony Albanese has pledged to retain them."